From 091f6e26eb326adbd718f406e440c838bed8ebb6 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Mon, 20 Jul 2015 21:16:28 +0100
Subject: MODSIGN: Extract the blob PKCS#7 signature verifier from module
 signing

Extract the function that drives the PKCS#7 signature verification given a
data blob and a PKCS#7 blob out from the module signing code and lump it with
the system keyring code as it's generic.  This makes it independent of module
config options and opens it to use by the firmware loader.

Signed-off-by: David Howells <dhowells@redhat.com>
Cc: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Ming Lei <ming.lei@canonical.com>
Cc: Seth Forshee <seth.forshee@canonical.com>
Cc: Kyle McMartin <kyle@kernel.org>
---
 include/keys/system_keyring.h | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'include/keys')

diff --git a/include/keys/system_keyring.h b/include/keys/system_keyring.h
index 72665eb80692..9791c907cdb7 100644
--- a/include/keys/system_keyring.h
+++ b/include/keys/system_keyring.h
@@ -28,4 +28,9 @@ static inline struct key *get_system_trusted_keyring(void)
 }
 #endif
 
+#ifdef CONFIG_SYSTEM_DATA_VERIFICATION
+extern int system_verify_data(const void *data, unsigned long len,
+			      const void *raw_pkcs7, size_t pkcs7_len);
+#endif
+
 #endif /* _KEYS_SYSTEM_KEYRING_H */
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